feat: DH-22990: improve clear command behaviour in console input

[dsmmcken]

Typing clear/cls in the console was unreliable — Monaco autocomplete would hijack Enter with a fuzzy match instead of running the command. This makes clearing the console reliable and discoverable.

• a single enter now always runs clear/cls even with the suggest widget open
• clear/cls now show in autocomplete (without suppressing word-based suggestions).
• added "Clear" to the console overflow menu
• added cmd/ctrl+l shortcut (updates live when rebound in settings), replacing previous shortcut that was supposed to clear the input but didn't actually do anything because monaco ate it

Not tested on mac. Please test.

Not sure how much gets reused in enterprise of this.

[codecov]

Codecov Report

❌ Patch coverage is 26.47059% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 50.86%. Comparing base (0c7d87c) to head (a0df86a).

Files with missing lines	Patch %	Lines
packages/console/src/ConsoleInput.tsx	36.84%	12 Missing ⚠️
packages/console/src/monaco/MonacoProviders.tsx	0.00%	7 Missing ⚠️
packages/console/src/Console.tsx	25.00%	3 Missing ⚠️
packages/console/src/ClearCommands.ts	33.33%	2 Missing ⚠️
packages/console/src/monaco/MonacoUtils.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2709      +/-   ##
==========================================
- Coverage   51.10%   50.86%   -0.25%     
==========================================
  Files         793      794       +1     
  Lines       45204    45228      +24     
  Branches    11703    11510     -193     
==========================================
- Hits        23103    23003     -100     
- Misses      22055    22206     +151     
+ Partials       46       19      -27     

Flag	Coverage Δ
unit	50.86% <26.47%> (-0.25%)	⬇️

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